With a configurable total link budget up to 109 dB and the efficiency of the ARM Cortex-M3 core, the STM32W is a perfect fit for the wireless sensor network market.The STM32W series includes devices with 64 to 256 KFlash, up to 16 KRam and is available in VFQFN40, UFQFN48 and VFQFN48 packages.

STM32W108 standard library firmware is here.
Library for SimpleMAC, RF4CE and Ember ZNet EZSP are here.WireShark is a network protocol analyzer for Unix and Windows.STM STM32W108 WireSharkServer that is here, the manual is here.Driver for Windows for Silicon Labs USB/RS232 bridge is here.Driver for Windows for FTDIUSB/RS232 bridge is here.

The kits demonstrate how effectively the STM32W108xx can be used in real IEEE 802.12.4 applications.
They are suitable for different types of wireless network scenarios such as:

Mesh networks (based on the ZigBee PRO protocol stack) typically used in home automation and smart energy applications

IPv6 over low power wireless Personal Area Networks

Remote control and target
networks (based on the ZigBee RF4CE protocol stack) used for driving
consumer devices such as TVs, set-top boxes, etc.

Point to point networks
(based on a simplified MAC library) used to address a basic IEEE
802.15.4 communication. This configuration enables customers to develop
any protocol stack of their choice

The STM32W-SK (also called STM32W108B-SK) and STM32W-EXT
starter and extension kits are easy to use tools for the STM32W108xx
microcontrollers. This family of microcontrollers integrates a 32-bit
ARMŽ Cortex™-M3 microprocessor and a 2.4 GHz, IEEE 802.15.4-compliant
transceiver. The kits demonstrate how effectively the STM32W108xx can
be used in real IEEE 802.15.4 applications.
The STM32W108xx kits provide demonstration applications and
documentation which serve as a reference for creating your own
applications and re-programming the STM32W108xx microcontroller. You
can run the STM32W108xx kits in several ways (building mesh networks,
remote control/target and point-to-point applications), using the
dedicated software libraries (ZigBee PRO, ZigBee RF4CE, and Simplified
MAC), as well as a third-party IDE and C compiler (IAR).Moreover, the
STM32W108xx kits provide a set of HAL APIs which allow you to use the
kit platform capabilities such as LEDs and serial communication
channels (virtual COM through USB).

STM32W-SK (also called STM32W108B-SK) - Evaluation kit for STM32 Wireless devicesClick here for detail about the way to use STM32W-SK (also called STM32W108B-SK).